Download Rangemaster RG70

Gas Hob
User Guide
Installation & Service Instructions
U109926 - 04
Before You Start...
Hob Overview
Cleaning Your Hob
Conversion to LPG Gas
Circuit Diagram
Technical Data
Warranty/After Sales Service
1. Before You Start...
DocNo.011-0001 - Introduction gas
Personal Safety
Thank you for buying a Rangemaster hob. It should give you
many years trouble-free cooking if installed and operated
correctly. It is important that you read this section before you
start, particularly if you have not used a gas hob before.
Accessible parts will become hot during use and will
retain heat even after you have stopped cooking.
Keep babies and children away from the hob and
never wear loose-fitting or hanging clothes while
the appliance is in use.
This appliance is designed for domestic cooking
only. Using it for any other purpose could invalidate
any warranty or liability claim. In particular, the
oven should NOT be used for heating the kitchen
­­– besides invalidating claims, this wastes fuel and
may overheat the control knobs.
When the hob is not in use make sure that the
control knobs are in the OFF position.
DO NOT use hotplate protectors, foil or hotplate
covers of any description. These may affect the safe
use of your hotplate burners and are potentially
hazardous to health.
Installation and Maintenance
In the UK, the hob must be installed by a CORGI registered
gas engineer. The electrical installation should be in
accordance with BS 7671. Otherwise, all installations
must be in accordance with the relevant instructions
in this booklet, with the relevant national and local
regulations, and with the local gas and electricity supply
company requirements.
Always keep combustible materials, e.g. curtains,
and flammable liquids a safe distance away from
your hob.
Do not spray aerosols in the vicinity of the hob while
it is on.
Use dry oven gloves when applicable – using damp
gloves might result in steam burns when you touch
Make sure that the gas supply is turned on and that the hob is
wired in and switched on (the hob needs an electricity supply
for ignition).
a hot surface. Do not use a towel or other bulky cloth
in place of a glove – it might catch fire if brought into
contact with a hot surface.
Only a qualified service engineer should service the hob and
only approved spare parts should be used.
Never operate the hob with wet hands.
Never heat unopened food containers. Pressure
build up may make the containers burst and cause
Always allow the hob to cool and then switch it off at the
mains before cleaning or carrying out any maintenance work,
unless specified otherwise in this guide.
Do not use unstable saucepans. Always ensure that
you position the handles away from the edge of the
Peculiar Smells
Make sure the room is well ventilated to the outside air (see
‘Ventilation’ below). People with respiratory problems should
vacate the area for this brief period.
Never leave the hotplate unattended at high heat settings.
Pans boiling over can cause smoking, and greasy spills may
catch on fire. Use a deep fat thermometer whenever possible
to prevent fat overheating beyond the smoking point.
If You Smell Gas
Do not turn electric switches on or off
Do not smoke
Do not use naked flames
Do turn off the gas at the meter or cylinder
Do open doors and windows to get rid of the gas
Do keep people away from the area affected
Call your gas supplier
If you are using natural gas in the UK ring the National Grid
on: 0800 111 999.
Never leave a chip pan unattended. Always heat fat
slowly, and watch as it heats. Deep fry pans should
be only one third full of fat. Filling the pan too full
of fat can cause spill over when food is added. If you
use a combination of oils or fats in frying, stir them
together before heating, or as the fats melt.
Foods for frying should be as dry as possible. Frost on frozen
foods or moisture on fresh foods can cause hot fat to bubble
up and over the sides of the pan. Carefully watch for spills or
overheating of foods when frying at high or medium high
temperatures. Never try to move a pan of hot fat, especially a
deep fat fryer. Wait until the fat is cool.
CAUTION: Using a gas cooking appliance will result in the
production of heat and moisture in the room in which it
is installed. Make that the kitchen is well ventilated; keep
natural ventilation holes open or install a powered cooker
hood that vents outside. If you have several burners on or
use the hob for a long time, open a window or turn on an
extractor fan.
Do not use water on grease fires and never pick up a
flaming pan. Turn off the controls and then smother
a flaming pan on a surface unit by covering the pan
completely with a well fitting lid or baking tray. If
available, use a multi-purpose dry chemical or foamtype fire extinguisher.
Take care that no water seeps into the appliance.
Only certain types of glass, glass-ceramic, earthenware or
other glazed containers are suitable for hotplate cooking;
others may break because of the sudden change in
In the interests of hygiene and safety, the hob should be kept
clean at all times as a build up of fats and other foodstuffs
could result in a fire.
Clean only the parts listed in this guide.
Clean with caution. If a wet sponge or cloth is used to wipe
spills on a hot surface, be careful to avoid steam burns. Some
cleaners can produce noxious fumes if applied to a hot
2. Hob Overview
DocNo.021-0002 - Overview RG70 gas
ArtNo.316-0006 RG70 hob
The diagram by each of the control knobs indicates which
burner that knob operates (Fig.2-1). Each burner has a
special Flame Safety Device (FSD) that stops the flow of gas if
the flame goes out.
To light a burner, push in and turn the associated control
knob counter-clockwise (Fig.2-2) to the ‘high’ position
indicated by the large flame symbol []. Keep the knob
pressed down for 3-5 seconds to let the gas through to the
burner. The igniter should spark and light the gas.
ArtNo.316-0001 RG60 hob control
If, when you let go of the control knob the burner goes out,
then the safety device has not held in. Turn the control to the
off position and wait one minute then try again, this time
holding in the control knob for slightly longer.
Adjust the flame to suit by turning the control knob clockwise
Ensure that the flames are under the pans. Using a lid will
help the contents boil more quickly (Fig.2-4).
ArtNo.316-0005 RG70 control to low
Large pans should be spaced well apart.
ArtNo.311-0001 Right pans gas
Pans and kettles with concave bases or down-turned base
rims should not be used (Fig.2-5).
Simmering aids, such as asbestos or mesh mats, are NOT
recommended. They will reduce burner performance and
could damage the pan supports (Fig.2-6).
ArtNo.311-0002 Pan with rim
You should also avoid using unstable and misshapen pans
that may tilt easily, and pans with a very small base diameter,
e.g. milk pans, single egg poachers (Fig.2-7).
The minimum recommended pan diameter is 120 mm. The
maximum allowable pan base diameter is 250 mm.
Triple Ring Burner
The triple ring burner is designed to provide even heat over
a large area (Fig.2-8). It is ideal for large pans and stir frying.
For heating smaller pans, the smaller hotplate burners may
be more efficient.
Art No. 311-0003 Simmer aids
Hob Care
The burner parts can be removed for cleaning; see ‘Cleaning
Your Hob’.
You should wipe the top surface of the hob around the
hotplate burners as soon as possible after spills occur. Try to
wipe any spills off while the hob is still warm.
Note: The use of aluminium pans may cause metallic marking
of the pan supports. This does not affect the durability of the
enamel and may be cleaned off with an appropriate metal
ArtNo.311-0004 Tipping wok
No.316-0006 RG70 hob
3. Cleaning Your Hob
DocNo.041-0002 - Cleaning gas 5-element
Essential Information
Allow the cooker to cool and then isolate the electricity
supply before carrying out any thorough cleaning.
Never use paint solvents, washing soda, caustic
cleaners, biological powders, bleach, chlorine based
bleach cleaners, coarse abrasives or salt.
Do not mix different cleaning products – they may
react together with hazardous results.
All parts of the hob can be cleaned with hot soapy water –
but take care that no surplus water seeps into the appliance.
Remember to switch on the electricity supply before re-using
the cooker.
Regular cleaning is recommended. For easier cleaning, wipe
away any spillages immediately.
ArtNo.316-0007 Gas burner
A – Cap, B – Head, C – Notch, D – Base, E – FSD, F – Electrode
Hotplate Burners
The burner heads and caps can be removed for cleaning.
Make sure they are absolutely dry before replacing them.
The Single Ring Burners
When refitting the burner head, ensure that the notch and
opening lines up with the electrode in the base (Fig.3-1).
Check that the burner head is level and that the cap is fitted
centrally on the burner head.
The Triple Ring Burner
ArtNo.316-0009 RG70 triple ring burner
The triple ring burner can also be taken apart for cleaning
When reassembling the burner, turn over the burner head
and note the shape of the central boss (Fig.3-3). Rotate the
burner head until the central boss matches the shape of the
burner base. Turn the head over and place it on the burner
A – Inner burner cap, B – Outer burner cap,
C – Burner head, D – Burner base
Fit the 2 burner caps, making sure that they are seated
ArtNo.316-0010 RG70 triple ring burner
A – Burner head (view from bottom), B – Burner base
Hotplate top
Cleaning Table
cleaning method
Stainless steel or
Hot soapy water and a soft cloth.
remove stubborn stains gently
with a nylon scourer.
Pan supports
Enamel coated
cast iron
Cif cream cleaner and a nylon
scourer; dishwasher.
Burner caps
Cif cream cleaner and a nylon
scourer; dishwasher.
ArtNo.050-0009 Cleaning
table 1
Burner heads
Refer to the cleaning tables (Table 3-1 and Table 3-2) for
details on cleaning the hob.
The cleaners listed are available from supermarkets or
electrical retailers. For enamelled surfaces use a cleaner
that is approved fro use on vitreous enamel.
Cif cream cleaner or similar with
a soft cloth. Take care not to be
too vigorous.
Table 3-1 Cleaning the hotplate
Control panel
cleaning method
Stainless steel or
Damp soft cloth. Do not use
abrasive cleaners on the
ArtNo.050-0010 Cleaning table 2
Control knobs Plastic and brushed Damp soft cloth.
Table 3-2 Cleaning outside the hotplate
If there is an installation problem and I don’t get
my original installer to come back to fix it, who
You do. Service organisations will charge for their callouts if they are correcting work carried out by your
original installer. Therefore, it’s in your own interest to
keep track of this installer so that you can contact them
as required.
Hotplate ignition or hotplate burners faulty
Is the power on? If not, there maybe something wrong
with the power supply.
Are the sparker (ignition electrode) or burner slots
blocked by debris?
Are the burner trim and caps correctly located? See the
section on ‘Cleaning’.
Hotplate burners will not light
Make sure that the burner parts have been replaced
correctly after wiping or removing for cleaning.
Check that there is not a problem with your gas
supply. You can do this by making sure that other gas
appliances you may have are working.
Do the burners spark when you turn on the control? If
not, check that the power is on.
Check the appliance is electrically safe and gas sound when you have finished.
DocNo.061-0002 - Installation - RG70 gas hob
Dear Installer
Before you start your installation, please complete the details
In the Republic of Ireland:
The installation must be carried out by a competent person
and installed in accordance with the current edition of IS 813
“Domestic Gas Installations”, the current Building Regulations
and reference should be made to the current ETCI rules for
electrical installation.
Installer’s Name
Provision of Ventilation
Installer’s Company
This appliance is not connected to a combustion products
evacuation device. Particular attention shall be given to the
relevant requirements regarding ventilation.
ArtNo.050-0011 - Installer information table
In the UK:
The room containing the hob should have an air supply
in accordance with BS 5440 Part 2. All rooms require an
openable window or equivalent, while some rooms require a
permanent vent in addition to the openable window. The hob
should not be installed in a bedsitting room with volume less
than 20 m³. If it is installed in a room of volume less than 5 m³
an air vent of effective area 100 cm² is required; if it is installed
in a room of volume between 5 m³ and 10 m³, an air vent of
effective area 50 cm² is required; while if the volume exceeds
11 m³, no air vent is required.
Installer’s Telephone Number
Appliance Serial Number
Should your customer have a problem relating to your
installation they will be able to contact you easily.
If there are other fuel burning appliances in the same room,
BS 5440 Part 2 should be consulted to determine the requisite
air vent requirements.
You must be aware of the following safety
requirements & regulations:
Before installing, make sure that the local
distribution conditions (nature of the gas and gas
In the Republic of Ireland:
Reference should be made to the current edition of IS 813,
which makes clear the conditions that must be met to
demonstrate that sufficient ventilation is available.
pressure) and the adjustment of the appliance are
This appliance must be installed in accordance with
the regulations in force and only in a well-ventilated
Location of the Hob
space. Read the instructions before installing or
using this appliance.
The hob may be installed in a kitchen/kitchen diner but NOT
in a room containing a bath or shower.
The regulations and standards are as follows:
Note: An appliance for use on LPG shall not be installed
in a room or internal space below ground level, e.g. in a
In the UK:
In your own interest and that of safety, it is law that
all gas appliances be installed by competent persons.
CORGI registered installers undertake to work to safe and
satisfactory standards. Failure to install the appliance
correctly could invalidate any warranty or liability claims and
lead to prosecution.
All models are supplied set for use on group H natural gas.
A conversion kit for LP gas is included with the appliance.
See the instructions that are supplied with the conversion
kit. After converting the appliance please attach the Gas
Conversion sticker over the appropriate area of the data
badge; this will identify the gas type the appliance is now set
This appliance should not be installed in a boat or
The hob must be installed in accordance with:
The relevant Building / IEE regulations
This appliance is designed for domestic cooking only. Use for
any other purpose could invalidate any warranty or liability
All relevant British Standards / Codes of Practice, in
particular BS 5440 Part 2
For Natural Gas – BS 6172 and BS 6891
For LP Gas – BS 5482-1 (when the installation is in a
permanent dwelling)
The Gas Safety (Installation and Use) regulations
Check the appliance is electrically safe and gas sound when you have finished.
You will need the following equipment to complete the hob
installation satisfactorily:
Gas Pressure tester
Flexible gas hose
You will also need the following tools:
510 mm
50 mm
(70mm including
gas connector)
Electric drill
Steel tape measure
Cross head screwdriver
Cut-outs in cabinet sides
to allow hob to sit across
480 mm
Adjustable spanner
Sharp knife
Checking the Parts
ArtNo.316-0028 - RGG77 cut-out dimensions
Check that the appliance is in a good condition after having
removed the packaging. In case of doubt, do not use the
appliance and contact the retailer.
The hob also has 3 pan supports.
Never leave the packaging materials (cardboard,
plastic bags, polystyrene foam, etc.) within children’s
600mm min
reach since they could become potential sources of
55mm min
Positioning the Hob
The hob should be fitted into a work surface, which is at least
600 mm deep. In position, the hob has a maximum thickness
of 50 mm from the top of the work surface, and an overall
thickness of 100 mm (120 mm max depth including the gas
connector). The cut-out dimensions are shown in (Fig.5-1),
and the minimum clearances in (Fig.5-2).
It is recommended that the hob be installed in a worktop
with a minimum thickness of 40 mm.
Note: If installing the hob over a standard cabinet, you may
have to remove part of the cabinet panels to allow the unit to
fit correctly (Fig.5-1).
650mm min
It is recommended that there is a minimum air gap of 100 cm²
underneath the hob to allow sufficient air circulation to the unit.
If installing a built-in oven directly under the hob then there
should be a minimum air gap of 20 mm between the oven and
the bottom of the hob. Failure to maintain a suitable clearance
may impair the performance of the hob.
ArtNo.316-0014 RG60 hob clearances
Any hob hood should be installed in accordance with the
hood manufacturer’s instructions.
Surfaces of furniture and walls at the sides and rear of the hob
should be heat, splash and steam resistant. Certain types of
vinyl or laminate kitchen furniture are particularly prone to
heat damage and discolouration.
Check the appliance is electrically safe and gas sound when you have finished.
No part of the pipe must be able to touch parts the
temperature of which exceeds 75 °C.
The pipe must not be pulled or twisted, throttled or
tightly bent.
It must not come into contact with sharp edges or
It must be easy to inspect the entire pipe length in order
to check its state of wear.
The pipe must be replaced within the date stamped on
the pipe itself.
If in doubt, contact your supplier.
We cannot accept responsibility for damage caused by
normal use of the hob to any material that de-laminates
or discolours at temperatures less than 65 °C above room
For safety reasons curtains must not be fitted immediately
behind the hotplate.
Conversion to LP
If the appliance is to be converted to LP gas do the
conversion at this point. See the conversion section of these
Gas Connection
After completing the gas connection check the hotplate is
gas sound with a pressure test.
Before connecting the appliance, check that it is suitable for
your gas and electricity supply. This information is on the data
label fixed to the underside of the hotplate. Gas connection
must comply with the relevant standards and regulations in
Pressure Testing
Natural Gas
The gas connection point is located towards the rear of the
hob. The inlet union is Rp ½.
LP Gas hotplates
Gas pressure table
The appliance must be connected to the gas supply system
with one of the following:
Table 5-1
A Rigid Steel Pipe
The joints of this pipe must consist of threaded fittings
conforming to the standards. The use of seals such as hemp
with suitable cement, or Teflon tape, is permitted.
The gas pressure can be measured at one of the hotplate
burner injectors (not the wok burner). Lift off a burner head.
Fit the pressure gauge to the injector. Turn on and light one
of the other hotplate burners. Turn on and push in the control
knob for the burner with the pressure gauge fitted to let gas
A Copper Pipe
The joints of this pipe must consist of unions with mechanical
Turn off the burners. Reassemble burner top, making sure it is
reassembled in the correct way on the burner body.
A Flexible Hose
A hose is not supplied by with the hotplate. Hoses may be
purchased at most builders’ merchants.
Fixing the Hob
The hob must be sealed to the work surface to prevent liquid
from entering into the cabinet. A tape seal is supplied with
the hob.
The hose should be fitted so that both inlet and outlet
connections are vertical so that the hose hangs downwards.
Carefully follow these instructions to correctly apply the
seal: Turn the hob over and place in on a secure, level
surface. Detach the seal from the backing, checking that the
transparent protection still adheres to the seal itself. Carefully
position the seal along the edge of the hob. Take special care
in the corners making sure there are no gaps. The ends of the
strips must fit together without overlapping.
The hose must be in accordance with the relevant standards.
In the UK these are:
For Natural Gas the flexible hose must be in accordance with
BS 669.
For LP Gas it should be capable of 50 mbar pressure, 70 °C
temperature rise and carry a red stripe, band or label.
If the surface that the hob is to be fitted to is tiled or is not
reasonably smooth, additional sealing with a waterproof
silicone sealant may be required.
Safety Information
Ensure that the gas supply pipe is never able to touch
moveable parts of the built-in cabinet (e.g. drawers). It must
not pass through compartments that could be used for
storage purposes.
Turn the hob back the right way up and position it in the
worktop cut-out.
Secure the hob to the worktop using the brackets supplied.
The positioning of the bracket (and sleeve) is dependent on
the thickness of the worktop as shown in (Fig.5-4).
When using a flexible hose, it is essential to comply with the
following instructions:
Note: Slide the optional sleeve onto the bracket if fitting to
thin work surfaces.
Locate the bracket to the slot on the hob base and then
tighten the retaining screw until it is locked to the worktop.
Check the appliance is electrically safe and gas sound when you have finished.
Electrical Connections
This appliance must be installed by a qualified electrician
to comply with the relevant Institute of Electrical
Engineers (I.E.E.) regulations and also the local electricity
supply company requirements.
30 mm
Note: All external wiring must comply with the IEE
Regulations for the Electrical Equipment of Buildings.
Connection to the electrical supply can be made with either
a plug and socket, or be permanently wired via a double pole
switch. The hob is supplied with a 3-core cable, 900 mm long.
If a replacement cable is fitted it must be 250 V high
temperature PVC (85 °C), 1 mm² minimum conductor size.
Plug Connection
For a plug connection a three-pin plug to BS 1363 with a
capacity of not less than 13A must be used and fitted with a
3A fuse, ‘ASTA’ approved to BS 1362.
40 mm
After replacing the fuse the cover must be refitted. If the
cover is lost, the plug must not be used until a replacement
cover has been obtained from your supplier. The colour of the
correct fuse carrier is that of the coloured insert in the base of
the fuse recess, or stated elsewhere on the plug. Always state
this colour when ordering a replacement fuse carrier.
IMPORTANT: The wires in the mains lead are coloured in
accordance with the following code:
Green and yellow: Earth
Hotplate Checks
Check each burner in turn. There is a spark ignition system
that works when the knob is pressed in. Each burner also has
a special safety device that stops the flow of gas if the flame
goes out.
Push in and turn a control knob to the large flame symbol [].
Keep holding the knob pressed in to let the gas through to
the burner for few seconds. The igniter should spark and light
the gas.
If, when you let go of the control knob, the burner goes out,
the safety device has not held in. Turn the control to the
off position and wait one minute, then try again this time
holding in the control knob for slightly longer.
Customer Care
Please complete your contact details in the front of this
section. Please inform the user how to operate the hotplate
and hand over the instruction pack.
Thank you.
Disconnect from electricity and gas before servicing. Check appliance is safe when you have finished.
6. Conversion to LPG Gas
Check in the ‘Technical Data’ section at the back of the
instructions that the cooker is convertible to the gas you
want to use.
This conversion must be performed by a suitably
competent person, in accordance with these
instructions and with the local supply company
Failure to convert the appliance correctly could
invalidate any warranty or liability claims and lead
ArtNo.140-0001 BI hobs LP gas conversion
to prosecution.
The conversion instructions must be used in
conjunction with the rest of the appliance
instruction, in particular for information on
Standards, cooker positioning, connection, hose
suitability, etc.
When servicing or replacing gas-carrying
components, disconnect from the gas before
starting, and check that the appliance is gas sound
after completion.
Do not use reconditioned or unauthorised gas
Disconnect from the electricity supply before
commencing servicing.
Before electrical reconnection, check that the
appliance is electrically safe.
Remove burner caps and heads. Remove the old jets.
Fit the new jets (see ‘Technical Data’ section at the back
of the book for correct jets). Reassemble in the ­­reverse
Tap Adjustment
Disconnect from the electricity supply.
Pull off all the control knobs. Insert a suitable small
flat screwdriver into the hole in the end of the control
spindle, and turn the bypass screw on each control
clockwise to the stop (Fig.6-1). Refit the control knob.
Affix Label
Stick the LP gas label over the natural gas part of the
appliance data label.
Pressure Testing
Make sure that the appliance is gas sound; refer to
‘Pressure Testing’ earlier in the section.
Check the operation of all the burners.
7. Circuit Diagram
ArtNo.080-0016 - RG70/RGG77 circuit diagram
Spark generator
Ignition switch
8. Technical Data
The hob is an independent Class 3 built-in unit.
This hob is category II2H3+.
It is supplied set for group H natural gas. A conversion kit from NG to LP gas is packed with the hob.
INSTALLER: Please leave these instructions with the user.
DATA BADGE LOCATION: Base of the hob.
Natural Gas
230 / 400 V 50 Hz
See appliance data badge for test pressures.
100 mm;
120 mm including gas connector
Overall height
Above worktop 50 mm;
Below worktop 50 mm
Overall width
720 mm; see ‘Positioning of Cooker’
Overall depth
510 mm
Space for fixing
See ‘Positioning of Cooker’
Minimum space above hotplate
650 mm
Rp ½ at rear right-hand side
230 / 400 V 50 Hz
Natural Gas
L.P. Gas
Triple ring burner
3.5 kW
3.5 kW (246g/h)
Large burners
3.0 kW
3.0 kW (210g/h)
Medium burners
1.75 kW
1.75 kW (119g/h)
Small burner
1.0 kW
1.0 kW (70g/h)
Gas burner inputs based on Gross Calorific Value.
Maximum total electric load at 230 V: 0.6 W.
9. Warranty/After Sales Service
If consultation or technical assistance is needed, please
provide the local authorised service agent with the purchase
invoice and the product code/serial number.
The 2 years free maintenance for the operation of the
appliance started from the date of purchase of this product.
Any cosmetic damage to the appliance must be reported
within 90 days of delivery.
For in-warranty service please call: 0845 6035312.
For general enquiries please call: 0870 7895107.
DocNo.000-0001 - Back cover Rangemaster
Clarence Street, Royal Leamington Spa,
Warwickshire, CV31 2AD, England.
Tel: +44 (0) 1926 457400 Fax: +44 (0) 1926 450526
E-mail: [email protected]
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